Kotaku asked about the BC and got a reply

[souixan]

routsounmanman said:
@mancandy & rage4dorder:

From my point of view:

Gamecube (at the moment): 99$
Wii : 249$

Wii > Gamecube but not enough to warrant a ~150$ difference...

Yeah because marketing, new production lines and patents don't add any cost to things...